Multiple Choice
Why does countercurrent exchange optimize gas exchange across some gills?
A) It sustains an optimal thermal environment for gas exchange.
B) It optimizes perfusion to the respiratory surface.
C) It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface.
D) It optimizes delivery of the respiratory medium to the respiratory surface.
E) It minimizes the area of diffusion.
Correct Answer:
Verified
Correct Answer:
Verified
Q41: The _ stimulate(s) forceful inhalation and exhalation.<br>A)
Q42: Air becomes deoxygenated during the _ of
Q43: Describe three adaptations that enhance the function
Q44: In humans, _ is involved in both
Q45: The _ in the mammalian airway acts
Q47: The function of carbonic anhydrase is to
Q48: Victims of CO poisoning turn "classic cherry
Q49: As elevation increases, O<sub>2</sub>_.<br>A) availability increases<br>B) availability
Q50: Birds utilize mechanisms similar to countercurrent exchange
Q51: Marine mammals use _ to extend dive